//spawning from list is slower but more random than from queue
//unfortunately, the two methods do not currently check against each other
//spawning from list is, however, currently never used in game
public PoolableParticle SpawnFromListAndPlay(Transform parent, Vector3 spawnAtPosWorld, Vector3 lookAtPosWorld)
{
if (poolList.Count <= 0)
{
return(null);
}
Transform tempParent = parent;
//choose a random PoolableParticle that isn't yet playing by incrementing the last index
//by an amount that prevents landing on the same index again
int randomInt = (lastListSpawn + Random.Range(1, poolList.Count - 1)) % poolList.Count;
PoolableParticle poolParticleToSpawn = poolList[randomInt];
//depending on luck and PoolableParticle use, this might take a while
while (poolParticleToSpawn.isPlaying)
{
randomInt = (lastListSpawn + Random.Range(1, poolList.Count - 1)) % poolList.Count;
poolParticleToSpawn = poolList[randomInt];
}
poolList.RemoveAt(randomInt);
poolParticleToSpawn.gameObject.SetActive(true);
poolParticleToSpawn.transform.position = spawnAtPosWorld;
poolParticleToSpawn.transform.SetParent(tempParent);
lookAtPosWorld.y = spawnAtPosWorld.y;
poolParticleToSpawn.transform.LookAt(lookAtPosWorld);
lastListSpawn = randomInt;
poolParticleToSpawn.PlayFromList();
return(poolParticleToSpawn);
}
void CreatePoolObject(Transform keeper, int i)
{
//instantiation of prefabs cycles through the array of prefabs
PoolableParticle p = Instantiate(particleSystems[i % particleSystems.Length], Vector3.zero, Quaternion.identity);
p.gameObject.SetActive(false);
p.transform.SetParent(keeper);
poolQueue.Enqueue(p);
poolList.Add(p);
p.SetupPoolableParticle(keeper, poolQueue, poolList);
}
//spawning from the queue is faster but keeps the order the prefabs were instantiated in
public PoolableParticle SpawnFromQueueAndPlay(Transform parent, Vector3 spawnAtPosWorld, Vector3 lookAtPosWorld)
{
if (poolQueue.Count <= 0)
{
return(null);
}
//parent can be null, in which case this PoolableParticle will be put at the top of the scene hierarchy
Transform tempParent = parent;
PoolableParticle poolParticleToSpawn = poolQueue.Dequeue();
poolParticleToSpawn.gameObject.SetActive(true);
poolParticleToSpawn.transform.position = spawnAtPosWorld;
poolParticleToSpawn.transform.SetParent(tempParent);
lookAtPosWorld.y = spawnAtPosWorld.y;
poolParticleToSpawn.transform.LookAt(lookAtPosWorld);
poolParticleToSpawn.PlayFromQueue();
return(poolParticleToSpawn);
}
private IEnumerator ReturnParticle(PoolableParticle particle, float delay)
{
yield return(new WaitForSeconds(delay));
particlePool.Push(particle);
}
